25 GDB Text User Interface

The GDB Text User Interface (TUI) is a terminal
interface which uses the curses library to show the source
file, the assembly output, the program registers and GDB
commands in separate text windows. The TUI mode is supported only
on platforms where a suitable version of the curses library
is available.

The TUI mode is enabled by default when you invoke GDB as
‘gdb -tui’.
You can also switch in and out of TUI mode while GDB runs by
using various TUI commands and key bindings, such as tui
enable or C-x C-a. See TUI Commands, and
TUI Key Bindings.